A research group focus on complex mechanics is lead by Prof. Yang who is a professor of Institute of Aeronautics and Astronautics in National Cheng Kung University (IAA, NCKU) in Taiwan since 2005. The group members includes 8 PhD students and 1 graduate student currently. The reaserch covers theoretical physics, scientific applications, and engineering applications, the topic includes quantum chaos, geometric phase of wave function, relativistic hydrogen atom, double slits analysis, molecular dynamics, nonlinear dynamics, quantum dots, quantum channel, and quantum control, etc.